Chiltern Energy Group
Updated March 2026

Boiler Upgrade Scheme: up to £7,500 Towards a Heat Pump in the Chilterns

The Boiler Upgrade Scheme (BUS) provides a £7,500 grant towards a qualifying heat pump installation. We apply on your behalf and deduct it from your invoice. You just pay the balance.

Who qualifies?

You have a valid EPC (within 10 years)

Your property needs an Energy Performance Certificate issued within the last 10 years. If you do not have one, we can arrange it. The EPC must not recommend cavity wall or loft insulation.

You are replacing a fossil fuel heating system

The grant applies to replacing gas, oil, or LPG boilers with a heat pump. Properties with electric heating may also qualify in some circumstances.

Your property is occupied (not new build)

The BUS grant applies to existing occupied homes. New build properties are not eligible.

Your installer is MCS-certified

Only MCS-certified installers can apply for the BUS grant. We are MCS-certified. You cannot claim through an uncertified installer.

Who does not qualify

  • New build properties
  • Properties with an EPC recommendation for cavity or loft insulation that has not been carried out
  • Replacing an existing heat pump
  • Commercial properties (separate scheme)
  • Properties without a current valid EPC

How the process works

  1. 1

    Book a site survey

    We visit your property, assess suitability, check your EPC, and confirm BUS eligibility on the day.

  2. 2

    System design

    We design the right heat pump system for your property, sized correctly for your heat loss and hot water demand.

  3. 3

    We apply for the grant

    As your MCS-certified installer, we submit the BUS application to Ofgem before installation.

  4. 4

    Grant approval

    Ofgem approves the voucher, typically within a few days to two weeks.

  5. 5

    Installation day

    We carry out the full installation. Most projects complete in 1–3 days depending on complexity.

  6. 6

    Reduced invoice

    The £7,500 grant is deducted from your invoice. You pay the balance.

Check my eligibility: free survey

What do homeowners ask about the Boiler Upgrade Scheme?

The Boiler Upgrade Scheme (BUS) is a government grant that provides £7,500 off the cost of installing an air source heat pump (or £7,500 off a ground source heat pump). It is administered by Ofgem and paid directly to your MCS-certified installer, who deducts it from your invoice.
No. Your MCS-certified installer applies on your behalf. The grant is deducted from your invoice. You pay the difference. We handle the application as part of every eligible heat pump installation.
An Energy Performance Certificate (EPC) rates your property's energy efficiency from A to G. To qualify for the BUS grant, your property needs a valid EPC (within 10 years) and must not have a current recommendation to install loft or cavity wall insulation. We check this at the site survey.
Yes. Landlords can claim the BUS grant for rental properties, provided the property meets the EPC requirements. The grant goes to the installer (us) and is deducted from the invoice.
No. The BUS grant is for new heat pump installations replacing fossil fuel heating systems (gas, oil, or LPG boilers). It does not apply to replacing an existing heat pump.
We submit the application before installation. Approval typically takes a few days to two weeks depending on Ofgem's current processing times. We handle all communication with Ofgem on your behalf.

Ready to claim your BUS grant?

Book a free site survey and we will handle the full grant application. You pay from £2,995 instead of from £10,495.

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